// 程序入口
    class GameStart extends ui.GameStartUI {
    constructor () {
        super()
        this.startBtn.on(Laya.Event.CLICK, this, this.startGame)
    }

    private startGame ():void {
        this.removeSelf()
        if (!GameMain.gameView) {
            GameMain.gameView = new GameView()
        }
        GameMain.gameView.gameStart()
        this.stage.addChild(GameMain.gameView)
    }
}